4x+5y=21 4x-2y=14
Do anyone know how to do this ?

Simplify the expression. enter the correct answer.

Hi, can anyone show me how to do this problem? 100 points for this. in advance

Acoffee shop orders at most $3,500 worth of coffee and tea. the shop needs to make a profit of at least $1,900 on the order. the possible combinations of coffee and tea for this order are given by this system of inequalities, where c = pounds of coffee and t = pounds of tea: 6c + 13t ≤ 3,500 3.50c + 4t ≥ 1,900 which graph's shaded region represents the possible combinations of coffee and tea for this order?